The only number is a 5Z3.
4 Gallon Aluminum Dry Sump Oil Tank & Oberg 6" Remote Oil Filter WDR5
NASCAR ALUMINUM CLEANABLE OIL FILTER HOUSING. NO SCREEN. OBERG STYLE
Oil Filter 6" OBERG 1/2" NPT PORTS UMP IMCA NHRA RAT ROD WISSOTA ASA K&N Mud
Roush Yates Oberg Pancake Oil Filter with Line NASCAR
Oil Filter 6" OBERG MOROSO UMP IMCA NHRA RAT ROD Mud RARE NEW
Oil Filter 6" OBERG MOROSO 2228 UMP IMCA NHRA RAT ROD WISSOTA ASA K&N Mud Holley
